"Harry Bloomfield"; "Esq." wrote in message
...
NY explained on 27/03/2021 :
I've seen some older cars (probably 1950s or before) which had this, but
it seems to have been outlawed here around 1960 (am I correct with that
approximate date?).

I would guess a decade at least later than that, but just a guess. An easy
conversion with an amber coloured lamp glass.

My mum's 1960 Morris Minor had orange (not red/white) indicators, at least
when mum bought it second-hand in 1966. They may have been fitted
after-sale, because it also had trafficators that still worked. I wonder if
Mum had them fitted when she bought the car.

My dad's C-reg Austin Cambridge and his E-reg Ford Corsair had them.

Older cars (eg 1950s Ford Zephyrs, and very early pre-Aeroflow 1962 Ford
Cortinas) had flashing white indicators at the front, but I'm not sure about
the indicators at the back.

So it looks as if new cars got them from the early 60s. I'm not sure when
flashing white/red on older cars actually became illegal and needed
modification to amber.